Type-writing machine.



F. A. ROBINSON.

TYPE WRITING MACHINE. APPLICATION FILED JULY 1,1910.

Patented Aug. 30, 1910.

' I I mining/y.

UNITED STATES r lgnnr OFFICE.

j FRANK A. ROBINSON, or NEW YORK, N. Y., Ass xenon T uunnnwoon TYPEWRITEIIR COMPANY, OF NEW YORK, N. Y.,

A CORPORATION OF DELAWARE.

TYPE-WRITING MACHINE.

To all whom it may concern: Be it known that I, FRANK. A. ROBINSON, acitizen of the United States, residing in the borough of Brooklyn, city of New York, in the county of Kings and State of New York, have invented certain new and useful Improvements in Type-\Vriting Machines, of which the following is a specification.

This inventionrelates to an auxiliary key to control a tabulating mechanism of a type- Writing machine.

All auxiliary key loosely connected to the main tabulating key-lever, is arranged at the front of the keyboard dear one end of the usual space bar, .said ke'y having a. broad surface, to enable its operation by merely resting the hand or wrist. thereon, Without necessitating the removal of the hand or avrist from the front of the keyboard. In the accompanyingdrawings, Figure 1 "is a perspective, showingthe application of.

the invention tothe frame of an Underwood Writing machine.- Fig. 2 is a plan of the device, the frame being shown in dotted lines.

Fig. -3 is a side "iew, the parts being in normal position. Fig. l is a similar view, she-W- ing the parts in operative position.

The main frame 1 of an Underwood Writing machine has a skeleton guard frame 2 I projecting forwardly from its base to inclose andprotect a keyboard comprising keys 3.

' A key 3 ,011 a lever 4, the latter pivoted at .5 to a bracket 6 at the rear of the frame 1,.svvings a tabulator rack 7, through a. link .8, pivoted at 9 to the key lever 4E, and at 10 t.o a lug 11 secured to a bar 12 connected With the arms 13 of the tabulating rack, said arms being journalcd intermediate their ends .on a rod 14 mounted in the frame 1. The tabulating rack is thus swung forwardly to interpose a column stop 15 (adjustable along the rack) in the path .of a stop 16 connected with the carriage'l'? mounted on the rear rail 18. A springli) returns the rack to nor mal position; and a spring 20 returns the lever 4 and key 3 to normal position.

Ari auxiliary tabulating key 21. is mounted on 'a'llever 22, the latter pivoted. at 23 to a member 2d of a clampf25 fixed to the frame 2, by a. screw 35. Said key 2 is preferably .of L form, and overlies the corner of frame 2 adjacent to one end of the usual. space bar Y 3 above hiehit projects, and it has a comparatively large area, to'enable its operation I I by merely resting the wrist or the ball of the Specification of Letters Patent. Application filed July 1, 1910. Serial No. 569,854.

Patented an. 30, 1910.

palm thereon. The key may overhang the guard frame 2 as shown, its under face being coneaved, as at 26, to clear the frame to permit the normal position of the key to be correspondingly lower. Said auxiliary key lever lies between the side of the guard frame and the keyboard Where it out of the Way.

The depression. of the auxiliary key 21 (Fig. rocks its lever 22 on thep1vot23, to SWl'HfJ: up a rack or segi'nent 27, fixed on said lever and meshing with a gear 28, journaled on the clamp and havmg an arm 25) to which is pivotally connected at 30, a

leased, the springs 19, 20 and 27 return the parts to normal position. x A stop 33 arrests the auxiliarykey mechanism'at normal-position.

The key 21 facilitates the ()pQYiltlOlLOf the tabulaiing mechanism, and renders the same almost mechanical on the part of the operator, the removal of his hand from the front part of the keyboard, not. being. required.

The device obviates the necessity of using a finger to depress the key;-is readily aflixed to existing machines toform a part thereof;

--opposes no obstruction to the independent operation of the main tabulating key;- is simple and inexpensive in construction, and occupies but little space.

'l laving thus described my invention, I

claim i. In a typewriting machine, the combination with a. tabulating mechanism, and a main tabulator key :and key-lever controlling said mechanism, of an auxiliary key lever also coi'itrollii'ig said tabulating mechanism and pivoted to the fram'eof the machine, and a link to which the auxiliary keylcver is operatively connected, said -link loosely connected with the main tabulating key lever to operate the main t'abulating key. 4

2. In a typewriting machine,the combi- 'llO nation with a tabulating mechanism, and a main tahulating key and key lever controlling said mechanism, of an auxiliary tabulatiug key and key lever. detachably eon- 'neeted to the machine, a segment on the 'board controlling said mechanism, of an auxiliary tabulator-controlling device comprising a clamp removably mounted on the frame of .the' machine, an auxiliary key lever pivot-ed to the clamp, said auxiliary lever lying between the frame and the keyboard and having a key, an arm pivotally mounted on the clamp and operatively connected with the auxiliary key lever, and a link connected to the arm and engaging the main' key lever to enable the latter to operate independently of the auxiliary key.

4-. In a typewriting machine, the combi frame, when depressed.

5. An attachment for keyboard-operated typeWri-ting machines having tabulating mechanism controlled by a main key, comprising an auxiliary tabulating key having faeomparatively broad surface, said auxiliary key being removably fastened to the frame of the machine and loosely connected with the main tabulating key to operate the latter and to enable the latter to be operated independently of the auxiliary 'key, and a spring to return the auxiliary key to normal position, and to maintainit in such position during the independent operation of the main tabulating key.

FRANK A. ROBINSON.

Witnesses:

FL B. lVrrrr-n,

N. H. MIT HELL. 

